The Milledgeville plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.
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5° on Nov. 13, 2019, the coldest reading for this week of the year since 1915. Next is 8° in 1933.
Milledgeville’s center stands about 1,050 ft above sea level. Within three miles the land runs from 1,020 ft to 1,060 ft, a difference of 40 ft: nearly flat ground.
Under the town center the state geologic map shows Tymochtee and Greenfield Formations, Undivided (dolostone), from the Silurian, 428 to 445 million years old.
The section below crosses 4 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 64×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Dolostone. Age: Silurian, 428 to 445 million years old. About 16 mi of the line.
Dolostone. Age: Silurian, 422 to 434 million years old. About 4 mi of the line.
Dolostone. Age: Silurian, 422 to 434 million years old. About 3 mi of the line.
Limestone. Age: Silurian, 422 to 445 million years old. About 1 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
A raindrop that lands in Milledgeville reaches the Gulf of America by way of Rattlesnake Creek, Paint Creek, the Scioto, the Ohio and the Mississippi: about 1,730 river miles.
970 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Milledgeville; river miles along the main stem, rounded.
Milledgeville has a hot-summer humid continental climate. Summer afternoons average 84° in July; winter nights fall to about 20° in January. A normal year brings about 18 inches of snow; with the rain, that comes to about 41 inches of water.
On November 14 Milledgeville normally reaches 52° and falls to 32°. The record high is 75°, in 1931; the record low 5°, in 2019. The most rain on this date, 1.50 in, fell in 1929.
Normals 1991–2020 and records since 1915 at Washington Court House, 10 miles east-southeast. NOAA, through RCC-ACIS.
